Return `Vector` when creating similar `VectorOfArray` with new length

[ErikQQY]

Question❓

Not sure if it's intended to behave like this or just a bug. When creating a similar array of VectorOfArray with a new length, wouldn't it be more intuitive to get VectorOfArray instead of just Vector? Since when we are doing the same for Vector{Vector}, we would end up getting Vector{Vector}.

julia> a = [rand(2) for _ in 1:3]
3-element Vector{Vector{Float64}}:
 [0.22672429007808392, 0.006545325869979246]
 [0.45202853665794596, 0.007153478061376006]
 [0.01950886804209273, 0.7556357057552318]

julia> va = VectorOfArray(a)
VectorOfArray{Float64,2}:
3-element Vector{Vector{Float64}}:
 [0.22672429007808392, 0.006545325869979246]
 [0.45202853665794596, 0.007153478061376006]
 [0.01950886804209273, 0.7556357057552318]

julia> similar(va, 4)
4-element Vector{Float64}:
 4.0e-323
 6.95219884198975e-310
 6.9522006963596e-310
 6.9521976152192e-310

julia> similar(a, 4)
4-element Vector{Vector{Float64}}:
 #undef
 #undef
 #undef
 #undef

[ChrisRackauckas]

That's not intended. It should be a VectorOfArray.